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If I read this right, you want to watch your 120fps videos at 0.25 their real speed, seeing every single frame but at 30fps. That's what I do (GoPro 3+, 720p, 120fps) but it's a bit involved. I use Blender video sequence editor. It's not intuitive but a good tutorial can make all the difference in the world, I learned with Mikeycal Meyers' tutorial: ...


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Based on all info, it looks like the difference occurs with FFmpeg's internal MPEG-4 part 2 encoder, whose use can be identified by the string mpeg4 (native) after the 2nd arrow in Stream #0:0 -> #0:0 (mpeg4 (native) -> mpeg4 (native)). If you use libxvid which is a third-party MPEG-4 part 2 encoder, the error does not occur. My guess is that the ...


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In theory, if the number of keyframes and their placement were about the same, as decided by the encoder, then yes, you can reduce the bitrate to half and retain the same quality. In practice, the encoder may be configured to place a keyframe every N seconds, in which case, you should use a bitrate a bit higher than half the original bitrate, say, around 55%....


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I just changed the title to focus on high-speed videography, which is a much, much narrower topic than videography (and cinematography) in general. The basics are these: due to persistence of vision, the eye can be fooled into interpreting a series of still images as if they are continuous motion at around 16 frames per second. There are a variety of ...


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Ok this question should probably be put on hold as it is way too broad for a single answer. If I understand you correctly, you're asking about both the technical and artistic aspects of both photography and videography, topics which people study for years in universities. So if you really want to learn all that stuff, sign up for a course at an university. ...


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Looks like you will need to transcode all clips with frame rates not matching the project's frame rate: If the frame rate is of a clip is not compatible with your project, it displays in red. You will be unable to import the clip into your project. Clips with incompatible frame rates may be playable in a new project set to the same frame rate as ...



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